Or they may be an endangered species, vanishingly rare among the varied bodies that comprise the celestial zoo.

Specialty growers of old-fashioned varieties are vanishingly rare in California.

But they all depend on isotopes that are vanishingly rare on Earth.

It is vanishingly rare, and for a time, Giacomo's descendants were the only people on the planet known to have it.

That is, are exact ties, in which the winner could be one of two or more candidates, vanishingly rare in large elections?

It has been reported in elderly but is vanishingly rare.

In the Old World, the disease is vanishingly rare before the 17th century.

Some delicacies, such as freshwater turtles, are vanishingly rare.

Street crime wasn't unknown on Grayson, but it was vanishingly rare compared to most urbanized planets.

Contrary to popular belief, Witwicky is a real name, but a vanishingly rare one.